cap

Abstract

The present invention provides a cap that can be opened with minimal force while simultaneously preventing it from opening unintentionally. [Solution] The cap body 100 and the outer cap 200 are provided with an engagement structure that restricts the movement of the outer cap 200 in the direction of the second position by engaging with each other when the outer cap 200 is in the first position. The engagement is released when the flexible portion 221 is pressed inward. The outer circumference of the engagement projection 121a is pressed inward by the inner circumferential surface of the outer cylinder portion 220 of the outer cap 200 when it is in the first position, causing the engagement projection 121a to engage with the engaged portion 51b and the cap body 100 to fit into the mouth portion 50. As the outer cap 200 moves from the first position to the second position, the outer circumference of the engagement projection 121a is no longer pressed by the inner circumferential surface of the outer cylinder portion 220, thereby releasing the engagement of the engagement projection 121a with the engaged portion 51b.

Description

Technical Field

[0001] The present invention relates to a cap.

Background Art

[0002] Conventionally, in a container provided with a cap that is detachable from a container body, a screw-type cap has been mainstream. In recent years, for example, in containers such as laminated tubes containing toothpaste or paste seasonings, caps with excellent usability, such as hinge-type caps or caps that can be pulled out or pushed in while pushing the side surface of the cap, have been increasing. For example, a cap composed of a cap body and an outer cap configured to be slidable on the cap body is known. In the cap configured in this way, the cap can be attached to and detached from the container by the sliding operation of the outer cap.

[0003] However, in the cap configured as described above, it is difficult to adjust the force required to slide the outer cap. That is, although it is desirable to be able to open and close the cap with as weak a force as possible, setting the force required to open the cap too weak so that the cap easily opens is not desirable. In particular, if the outer cap is simply set to be slidable with a weak force, there is a possibility that the cap will open unintentionally.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a cap that can be opened with a weak force while suppressing the unintentional opening of the cap. [Means for solving the problem]

[0006] To solve the above problems, the present invention employs the following means.

[0007] In other words, the cap of the present invention comprises a cap body that is detachably attached to the mouth of the container body, and an outer cap that covers the outer circumference of the cap body and is configured to slide vertically, wherein the outer cap is configured to slide between a first position in which the cap body is fitted to the mouth and a second position in which the cap body is not fitted to the mouth, and the cap body and the outer cap are provided with an engagement structure that engages with each other when the outer cap is in the first position, thereby restricting the movement of the outer cap in the direction of the second position, wherein the engagement structure is provided with the outer cap The outer cylinder of the cap has a flexible portion formed thereon, and the engagement is released when the flexible portion is pressed inward. The lower end of the cap body is provided with an engaging projection that can engage with a receiving portion provided in the opening. The outer circumference of the engaging projection is pressed inward by the inner circumferential surface of the outer cylinder of the outer cap when it is in the first position, causing the engaging projection to engage with the receiving portion and the cap body to fit into the opening. As the outer cap moves from the first position to the second position, the outer circumference of the engaging projection is no longer pressed by the inner circumferential surface of the outer cylinder, thereby releasing the engagement of the engaging projection with the receiving portion.

[0008] According to the present invention, by pressing the flexible portion formed on the outer cylinder of the outer cap, the engagement structure This allows the engagement in the part to be released, enabling the outer cap to slide from the first position to the second position. By simply sliding the outer cap from the first position to the second position, the engagement between the engaging projection and the engaged part is released, and the cap body can be made to a non-fitted state relative to the opening. As a result, even if the cap is set to be able to be opened with little force, the outer cap cannot be slid without pressing the flexible part, thus preventing the cap from opening unintentionally.

[0009] The body portion of the cap may have a body-side flexible portion at a position corresponding to the flexible portion, and the engagement structure may be formed by the flexible portion and the body-side flexible portion. Furthermore, a rotation stopper structure may be provided at the position where the flexible portion and the body-side flexible portion face each other, thereby restricting the relative rotation between the cap body and the outer cap. This prevents the positions of the flexible portion and the body-side flexible portion from becoming misaligned, which would prevent the engagement structure from being formed.

[0010] The rotation stopper structure preferably includes a circumferentially extending groove provided on the inner circumferential surface of the outer cap, and a rotation-restricting projection provided on the outer circumferential surface of the cap body, configured to abut against the circumferential groove side surface of the groove. Furthermore, the outer circumferential surface of the cap body preferably includes a retaining projection configured to abut against the vertical groove side surface of the groove, thereby restricting the vertical movement range of the outer cap relative to the cap body and preventing the cap body from coming off the outer cap. As a result, when the outer cap is slid from the first position to the second position, the cap body can be made to be disengaged from the mouth, as described above, and when the outer cap is pulled further, the outer cap and the cap body can be removed together from the container body. It is also preferable that the retaining projection functions as the rotation-restricting projection.

[0011] The lower end of the cap body is provided with a plurality of enlarged diameter sections spaced apart in the circumferential direction, and the engaging projections are provided on the inner circumferential surfaces of each of the plurality of enlarged diameter sections. As a result, the inner circumferential surface of the outer cylinder of the outer cap slides against the outer circumferential surface of the enlarged diameter section, causing the enlarged diameter section to deform and flex, thereby engaging and disengaging the engaging projections. Therefore, the force required to flex the enlarged diameter section and return it to its original state can be set to be weak.

[0012] The flexible portion is preferably composed of the inner part of a U-shaped first slit that penetrates the outer cylinder, and the main body-side flexible portion is preferably composed of the inner part of a U-shaped second slit that penetrates the body and corresponds to the flexible portion. Furthermore, the main body-side flexible portion has a projection that protrudes radially outward, and when the outer cap is in the first position, the projection is preferably engaged with the inner wall surface of the first slit.

[0013] Furthermore, the above configurations can be combined and adopted as much as possible. [Effects of the Invention]

[0014] As described above, according to the present invention, it is possible to open the cap with little force while suppressing the cap from opening unintentionally. [Brief explanation of the drawing]

[0015] [Figure 1] Figure 1 is a schematic diagram of the cap body according to Embodiment 1 of the present invention. [Figure 2] Figure 2 is a schematic diagram of the cap body according to Embodiment 1 of the present invention. [Figure 3] Figure 3 is a schematic diagram of the outer cap according to Embodiment 1 of the present invention. [Figure 4] Figure 4 is a schematic diagram of the outer cap according to Embodiment 1 of the present invention. [Figure 5] Figure 5 is an explanatory diagram illustrating the operation of attaching and detaching the cap to the container body according to Embodiment 1 of the present invention. [Figure 6]FIG. 6 is an explanatory diagram of the attachment / detachment operation of the cap to the container body according to Embodiment 1 of the present invention. [Figure 7] FIG. 7 is a schematic configuration diagram of the cap according to Embodiment 2 of the present invention.

Mode for Carrying Out the Invention

[0016] Hereinafter, with reference to the drawings, the mode for carrying out this invention will be exemplarily and specifically described based on examples. However, dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention only to those, unless there are specific descriptions.

[0017] (Embodiment 1) Referring to FIGS. 1 to 6, the cap according to Embodiment 1 of the present invention will be described. FIG. 1 is a schematic configuration diagram of the cap body according to Embodiment 1 of the present invention, (a) is a plan view of the cap body, and (b) is a front view of the cap body (viewed in the V1 direction in (a)). FIG. 2 is a schematic cross-sectional view of the cap body according to Embodiment 1 of the present invention (cross-sectional view AA in FIG. 1(a)). FIG. 3 is a schematic configuration diagram of the outer cap according to Embodiment 1 of the present invention, (a) is a plan view of the outer cap, and (b) is a front view of the outer cap (viewed in the V2 direction in (a)). FIG. 4 is a schematic cross-sectional view of the outer cap (cross-sectional view BB in FIG. 3(a)). FIGS. 5 and 6 are explanatory diagrams of the attachment / detachment operation of the cap to the container body according to Embodiment 1 of the present invention, and each member is shown in a schematic cross-sectional view.

[0018] In the following description, "up" means the vertical up direction in the state where the cap is facing up with respect to the container body when the cap is attached to the container body, and "down" means the vertical down direction in the state where the cap is facing up with respect to the container body when the cap is attached to the container body.

[0019] In this embodiment, a container such as a laminated tube for containing toothpaste or paste seasonings will be described as an example. However, the present invention is not limited to such a container and can be applied to various containers such as plastic bottles, glass containers, and metal containers.

[0020] <Container> The container is composed of a container body 50 and a cap 10. First, the container body 50 will be described with reference to FIGS. 5 and 6. In these figures, only a part of the container body 50 is shown. The container body 50 includes a mouth portion 51, a shoulder portion 52, and a body portion (not shown). The mouth portion 51 is a portion that is narrower than the shoulder portion 52 at the upper part of the body portion and corresponds to the neck portion having a mouth (opening) at the tip.

[0021] In this embodiment, the inner peripheral surface 51a of the mouth portion 51 is constituted by a cylindrical surface. The inner peripheral surface 51a corresponds to the mouth (opening). An engaged portion 51b having an outer diameter larger than that of the upper cylindrical surface (the tip side of the mouth portion 51) is provided on the outer peripheral surface of the mouth portion 51. The outer peripheral surface of the engaged portion 51b according to this embodiment is constituted by an annular projection having a tapered surface that expands in diameter from the upper end (tip) side of the mouth portion 51 toward the body portion and a tapered surface that contracts in diameter from the upper end side toward the body portion, and the cross-sectional shape of this annular projection is triangular. In this embodiment, the case where the engaged portion is constituted by an annular projection is shown, but the engaged portion in the present invention is not limited to an annular projection and can also be constituted by a projection provided intermittently in the circumferential direction.

[0022] <Cap> The cap 10 that is detachably configured with respect to the mouth portion 51 of the container body 50 will be described in detail. In this embodiment, the cap 10 is configured to be attached to the mouth portion 51 by a pushing operation and removed from the mouth portion 51 by a pulling operation. This cap 10 is composed of a cap body 100 and an outer cap 200.

[0023] <Cap body> The cap body 100 will be described in particular with reference to Figures 1 and 2. The cap body 100 comprises a top plate portion 110 and a cylindrical body portion 120 that is attached to the mouth portion 51. The top plate portion 110 comprises a sealing portion 111 configured to protrude downward, a first cylindrical projection 112 protruding upward, and a second cylindrical projection 113 that protrudes downward outside the sealing portion 111. The sealing portion 111 consists of a cylindrical portion that can be fitted to the inner circumferential surface 51a of the mouth portion 51 and a closing portion that closes the lower end of the cylindrical portion. The sealing function is achieved when the outer circumferential surface of the cylindrical portion of the sealing portion 111 and the inner circumferential surface 51a of the mouth portion 51 are in close contact. The first cylindrical projection 112 plays a role in positioning the cap body 100 and the outer cap 200 when the cap 10 is closed. The second cylindrical projection 113 abuts against the tip 51c of the mouth 51 of the container body 50, thereby positioning the cap body 100 in the vertical axis direction relative to the container body 50. Note that if positioning is possible on the lower surface of the top plate portion 110, a configuration without the second cylindrical projection 113 can be adopted. Furthermore, the second cylindrical projection 113 can also provide a sealing function.

[0024] Furthermore, the lower end of the cap body 100 (the lower end of the body portion 120) is provided with an engaging projection 121a that can engage with a receiving portion 51b provided on the mouth portion 51 of the container body 50. In this embodiment, the lower end of the cap body 100 is provided with a plurality of enlarged diameter portions 121 that are spaced apart in the circumferential direction, and the above-mentioned engaging projection 121a is provided on the inner circumferential surface of each of these plurality of enlarged diameter portions 121. Here, the inner circumferential surface of the body portion 120 is composed of a stepped surface having a small diameter surface with a small inner diameter and a large diameter surface provided below the small diameter surface with a larger inner diameter than the small diameter surface. As a result, the body portion 120 is configured such that the wall thickness is thinner on the side of the enlarged diameter portion 121, and while the overall rigidity of the body portion 120 is maintained, the enlarged diameter portion 121 is configured to bend easily. The cap body 100 is made of a resin material (for example, polyethylene (PE) or polypropylene (PP)) that allows the enlarged diameter portion 121 to have appropriate flexibility.

[0025] <Outer cap> The outer cap 200 will be described in particular with reference to Figures 3 and 4. The outer cap 200 comprises a top plate portion 210 and an outer cylinder portion 220 that covers the outer circumference of the body portion 120 of the cap body 100 and is slidable in the vertical direction. In addition, a cover portion 223 is provided at the lower end of the outer cylinder portion 220 to protect the enlarged diameter portion 121 of the cap body 100 by covering the enlarged diameter portion 121.

[0026] The outer cap 200 is configured to slide between a first position in which the cap body 100 is fitted onto the opening 51 and a second position in which the cap body 100 is not fitted onto the opening 51. This will be explained in detail in the section below on the operation of attaching and detaching the cap 10 to the container body 50. Figures 5(a) and 5(b) show the outer cap 200 in the first position relative to the cap body 100, and Figures 6(a) and 6(b) show the outer cap 200 in the second position relative to the cap body 100.

[0027] <Engagement structure and rotation stopper structure> The cap body 100 and the outer cap 200 are provided with an engagement structure that restricts the movement of the outer cap 200 in the direction of the second position by engaging with each other when the outer cap 200 is in the first position. This engagement structure is formed on the body portion 120 of the cap body 100. It consists of a flexible portion 122 on the main body side and a flexible portion 221 formed on the outer cylindrical portion 220 of the outer cap 200. That is, the cap body 100 and the outer cap 200 are arranged so that the flexible portion 122 and the flexible portion 221 on the main body side are in corresponding positions, more specifically, the outer peripheral surface of the flexible portion 122 and the inner peripheral surface of the flexible portion 221 are in opposing positions, thereby forming an engagement structure with these flexible portion 122 and flexible portion 221.

[0028] The flexible portion 221 is composed of the inner part of a U-shaped first slit 221a that penetrates the outer cylinder portion 220, and the main body side flexible portion 122 is composed of the inner part of a U-shaped second slit 122a that penetrates the body portion 120 and corresponds to the flexible portion 221. The main body side flexible portion 122 has a projection 122b that protrudes radially outward, and when the outer cap 200 is in the first position, the projection 122b is configured to engage with the inner wall surface of the first slit 221a (see Figure 5(a)).

[0029] With the engagement structure configured as described above, when the flexible portion 221 formed on the outer cylinder portion 220 of the outer cap 200 is pressed inward, the flexible portion 122 on the main body side is pressed by the flexible portion 221 and bends inward. As a result, the protruding portion 122b separates from the inner wall surface of the first slit 221a, and the engagement is released.

[0030] As described above, the engagement structure needs to be positioned so that the main body side flexible portion 122 and the flexible portion 221 are in corresponding positions (opposing positions). Therefore, the circumferential positional relationship between the cap body 100 and the outer cap 200 needs to be maintained. In this embodiment, a rotation stopper structure is provided at the position where the main body side flexible portion 122 and the flexible portion 221 are opposite each other, to restrict the relative rotation between the cap body 100 and the outer cap 200.

[0031] This rotation stopper structure consists of a circumferentially extending groove 222 provided on the inner circumferential surface of the outer cap 200, and a rotation-restricting projection 123 provided on the outer circumferential surface of the cap body 100, configured to abut against the circumferential groove side surface of the groove 222. The rotation-restricting projection 123 is configured to fit into the groove 222. As a result, when attempting to rotate the cap body 100 and the outer cap 200 relative to each other, the rotation-restricting projection 123a in the rotational direction abuts against the circumferential inner wall surface 222a of the groove 222, thereby restricting rotation.

[0032] Furthermore, in this embodiment, when the outer cap 200 slides vertically relative to the cap body 100, the rotation-restricting projection 123 is configured to contact the vertical groove sides 222b and 222c of the groove 222. This restricts the vertical range of movement of the outer cap 200 relative to the cap body 100. Therefore, when the outer cap 200 slides upward relative to the cap body 100, the rotation-restricting projection 123 abuts against the lower groove side 222b of the groove 222, thereby preventing the cap body 100 from coming off the outer cap 200. As described above, in this embodiment, the rotation-restricting projection 123 also functions as a retaining projection that prevents the cap body 100 from coming off the outer cap 200. However, it is also possible to adopt a configuration in which the rotation-restricting projection and the retaining projection are provided separately.

[0033] <The process of attaching and detaching the cap from the container body> Referring to Figures 5 and 6, the operation of attaching and detaching the cap 10 from the container body 50 will be explained. First, the operation of opening the cap 10 will be explained.

[0034] Figure 5(a) shows the cap 10 in the closed position. In this state, the outer cap 200 is in the first position relative to the cap body 100, the engaging projection 121a is engaged with the engaged portion 51b, and the protruding portion 122b is engaged with the inner wall surface of the first slit 221a. In this state, the cap 10 (outer cap 200) is removed from the container body 50. Even if one attempts to simply pull it off, the outer cap 200 will not slide relative to the cap body 100 because the protruding portion 122b is engaged with the inner wall surface of the first slit 221a. Therefore, the engagement of the engaging projection 121a with the engaged portion 51b is not released, and the cap 10 cannot be removed from the container body 50.

[0035] When opening the cap 10, the user presses inward the flexible portion 221 formed on the outer cylinder portion 220 of the outer cap 200, as shown by arrow P in Figure 5(b). This causes the flexible portion 122 on the main body side to bend inward due to the pressure from the flexible portion 221. As a result, the protrusion 122b separates from the inner wall surface of the first slit 221a, releasing the engagement and allowing the outer cap 200 to slide relative to the cap body 100. However, the engagement of the engaging projection 121a with the engaged portion 51b is maintained. In this state, the user slides the outer cap 200 in the direction of pulling it out of the container body 50. The cap body 100 remains fitted into the mouth portion 51 while the outer cap 200 slides in the second direction.

[0036] Figure 6(a) shows a state in which the positional relationship between the cap body 100 and the container body 50 remains unchanged, and the outer cap 200 has slid to the second position relative to the cap body 100. In this state, the engagement of the engaging projection 121a with the engaged portion 51b is released. That is, as the outer cap 200 moves from the first position to the second position, the outer circumference of the engaging projection 121a (the outer circumference of the enlarged diameter portion 121) is no longer pressed by the inner circumference of the outer cylinder portion 220, and the enlarged diameter portion 121 returns to its original state due to its elastic restoring force. Therefore, the engagement of the engaging projection 121a with the engaged portion 51b is released.

[0037] Then, when the outer cap 200 is pulled further in the direction of being removed from the container body 50, the rotation-restricting projection 123, which acts as a retaining projection, abuts against the lower groove side surface 222b of the groove 222, and the outer cap 200 and the cap body 100 are pulled together. As a result, the cap 10 can be removed from the container body 50, as shown in Figure 6(b).

[0038] Next, the operation of closing the cap 10 will be explained. As shown in Figure 6(b), in the cap 10, the cap body 100 is pre-fitted inside the outer cap 200. When the cap 10 is fitted onto the mouth 51 of the container body 50, first, the sealing portion 111 of the cap body 100 fits onto the inner circumferential surface 51a of the mouth 51 of the container body 50. Then, the cap body 100 moves to a position where the second cylindrical projection 113 abuts against the tip 51c of the mouth 51 of the container body 50 (see Figure 6(a)). Through the above operation, the mouth 51 is closed by the sealing portion 111.

[0039] As the cap 10 is pushed in further, the outer cap 200 slides relative to the cap body 100 and moves to the first position as shown in Figure 5(a). As a result, the outer circumference of the engaging projection 121a (the outer circumference of the enlarged diameter portion 121) is pressed inward by the inner circumferential surface of the outer cylinder portion 220 of the outer cap 200, causing the engaging projection 121a to engage with the engaged portion 51b and the cap body 100 to fit into the mouth portion 51. That is, as the outer cap 200 slides from the second position to the first position, the enlarged diameter portion 121 is pushed inward by the inner circumferential surface of the outer cylinder portion 220. As a result, the enlarged diameter portion 121 begins to flex, and as the cap 10 is pushed in further, the outer cap 200 slides to a position where its top plate portion 210 abuts against the first cylindrical projection 112 of the cap body 100. As a result, the enlarged diameter portion 121 is also bent to the position where the engagement of the engaging projection 121a with the engaged portion 51b is completed (see Figure 5).

[0040] In this way, the cap 10 can be closed simply by pushing it into the opening 51 of the container body 50.

[0041] <Advantages of the cap according to this embodiment> According to this embodiment, the cap 10 can be opened and closed by sliding the outer cap 200 up and down relative to the cap body 100. However, when opening the cap 10, it is necessary to press the flexible portion 221 formed on the outer cylindrical portion 220 of the outer cap 200. Therefore, even if the cap 10 is set to be able to be opened with little force, the outer cap 200 cannot be slid without pressing the flexible portion 221, thus preventing the cap 10 from opening unintentionally.

[0042] Furthermore, in this embodiment, a configuration is adopted in which the outer diameter portion 121, which is pre-expanded, is deflected inward by the inner surface of the outer cylinder portion 220 of the outer cap 200 sliding against the outer surface of the pre-expanded diameter portion 121. Therefore, the force required to slide the outer cap 200 when closing the cap 10 can be set to be weaker. Also, by sliding the outer cap 200 upward, the diameter portion 121 returns to its original state due to its elastic restoring force, so the force required to slide the outer cap 200 when opening the cap 10 can be set to be weaker.

[0043] (Example 2) Figure 7 shows Embodiment 2 of the present invention. Embodiment 1 described above shows a configuration in which an enlarged diameter portion is provided below the body of the cap, and an engaging projection is provided on its inner circumferential surface. In this embodiment, the configuration shows a case in which an enlarged diameter portion is not provided below the body, and an engaging projection is provided on its inner circumferential surface. The other configurations and operations are the same as in Embodiment 1, so the same reference numerals are used for the same components, and their descriptions are omitted.

[0044] Figure 7 is a schematic cross-sectional view of a cap according to Embodiment 2 of the present invention, where (a) shows the outer cap in the second position and (b) shows the outer cap in the first position. In Figure 7, only the cross-sectional view of the cap body and outer cap is shown, and the depth line is omitted. The cap according to this embodiment also comprises a cap body 100X and an outer cap 200, similar to Embodiment 1. The configuration of the outer cap 200 is the same as in Embodiment 1. An engaging piece 121X is provided on the lower part of the body of the cap body 100X, which is configured not to expand in diameter when no external force is acting on it. Although not specifically shown in the figures, multiple slits are provided at circumferential intervals on the lower end of the body so that the engaging piece 121X can be easily deformed inward, and each engaging piece 121X is formed by the portion between the slits. Engaging projections 121Xa are provided on the inner circumferential surface of each of these multiple engaging pieces 121X. Furthermore, the outer circumferential surface of these engaging pieces 121X is provided with a pressable projection 121Xb.

[0045] With the above configuration, by sliding the outer cap 200 downward relative to the cap body 100X, the pressing projection 121Xb is pressed by the inner circumferential surface of the outer cylindrical portion 220 of the outer cap 200, causing the engaging piece 121X to deform inward. As a result, similar to Embodiment 1, the engaging projection 121Xa can be engaged with the engaging portion 51b provided on the outer circumferential surface of the mouth portion 51 of the container body 50.

[0046] The engagement structure and the rotation stopper structure are configured in the same way as in Example 1. Therefore, the same effects and benefits as in Example 1 can be obtained regarding the engagement structure and the rotation stopper structure.

[0047] (others) Regarding the engagement structure, it is not limited to the structure shown in Embodiment 1 above. Various known techniques can be employed in which two members having cylindrical portions can engage with each other, and the engagement can be released by pressing a part of the outer peripheral surface of the cylindrical portion of the outer member. For example, the flexible portion can be formed by inverting the U-shaped second slit 122a shown in Figure 1. Similarly, the U-shaped first slit 221a shown in Figure 3 can be inverted. A flexible portion can also be formed in this manner.

[0048] Furthermore, although the above embodiment shows a configuration in which the engagement structure is provided in only one place, it is also possible to adopt a configuration in which the engagement structure is provided in two places (two places on both sides of the central axis of the cylindrical part). [Explanation of symbols]

[0049] 10: Cap 100,100X: Cap body 110:Top plate part 111: Seal part 112: First cylindrical projection 113: Second cylindrical projection 120: Torso 121: Expanded diameter part 121X: Engagement piece 121a, 121Xa: Engagement protrusion 121Xb: Pressed projection 122: Flexible part on the main body side 122a: Second slit 122b:Protrusion 123: Rotation-restricting protrusion 123a: End face 200: Outer cap 210: Top panel 220: Outer cylinder part 221:Flexible part 221a: First slit 222: Groove 222a: Interior wall surface 222b, 222c: Groove side 223: Covering part 50: Container body 51: Mouth 51a: Inner circumferential surface 51b: The combined section 51c: apex 52: Shoulders

Claims

1. The container body has a detachable cap that can be attached to the opening, An outer cap that covers the outer circumference of the cap body and is configured to slide vertically, Equipped with, The outer cap is configured to slide between a first position in which the cap body is fitted to the opening and a second position in which the cap body is not fitted to the opening. The cap body and the outer cap are provided with an engagement structure that engages with each other when the outer cap is in the first position, thereby restricting the movement of the outer cap in the direction of the second position. The engagement structure has a flexible portion formed on the outer cylinder of the outer cap, and is configured such that the engagement is released when the flexible portion is pressed inward. The lower end of the cap body is provided with an engaging projection that can engage with the engagement portion provided in the opening. The outer circumference of the engaging projection is pressed inward by the inner circumferential surface of the outer cylinder portion of the outer cap, which is located in the first position, causing the engaging projection to engage with the engaged portion and the cap body to fit into the opening. A cap characterized in that, during the process of the outer cap moving from a first position to a second position, the outer circumference of the engaging projection is no longer pressed by the inner circumferential surface of the outer cylinder, thereby releasing the engagement of the engaging projection with the engaged portion.

2. The cap according to claim 1, wherein the body portion of the cap body has a body-side flexible portion at a position corresponding to the flexible portion, and the engagement structure is formed by the flexible portion and the body-side flexible portion.

3. The cap according to claim 2, characterized in that a rotation stopper structure is provided at a position where the flexible portion and the flexible portion on the main body side face each other, which restricts the relative rotation between the cap body and the outer cap.

4. The aforementioned rotation stopper structure is, A groove extending in the circumferential direction is provided on the inner circumferential surface of the outer cap, A rotation-restricting projection is provided on the outer circumferential surface of the cap body and is configured to contact the groove side surface in the circumferential direction of the groove, The cap according to claim 3, characterized by having the following features.

5. The cap according to claim 4, characterized in that the outer circumferential surface of the cap body is provided with a retaining projection configured to abut against the groove side surface in the vertical direction of the groove, and which restricts the vertical movement range of the outer cap relative to the cap body, thereby preventing the cap body from coming off the outer cap.

6. The cap according to claim 5, characterized in that the retaining projection also functions as the rotation restricting projection.

7. The cap according to any one of claims 1 to 6, wherein the lower end of the cap body is provided with a plurality of enlarged diameter portions that are spaced apart in the circumferential direction, and the engaging projection is provided on the inner circumferential surface of each of the plurality of enlarged diameter portions.

8. The flexible portion is composed of the inner portion of a U-shaped first slit that penetrates the outer cylinder portion, and the main body side flexible portion is a U-shaped second slit that penetrates the body portion and corresponds to the flexible portion. The cap according to any one of claims 2 to 6, characterized in that it is composed of a portion inside the slit.

9. The cap according to any one of 2 to 6, characterized in that the flexible portion on the main body side has a projection that protrudes radially outward, and when the outer cap is in the first position, the projection engages with the inner wall surface of the first slit.

Images